Feasibility Study on Remote Cognitive Assessment With Older People. A Counter-balanced Crossover Trial.

In February and March 2021, the 237 donors of our Brain Bank, aged between 65 and 98 and living at home, were interviewed by telephone. The purpose of the survey was to collect information on how they were experiencing the isolation linked to the pandemic in the last year, on health conditions and sleep, daily habits (nutrition, movement, leisure), use of the Internet and social networks as a way to maintain contact with one's family-friend network and experiences of loneliness (Rolandi et al, 2020). In this context, the willingness to participate in a study on remote cognitive assessment by phone, personal computer or tablet was explored.

The sample size was calculated to estimate differences between testing conditions, i.e. face-to-face and remote testing (telephone or videoconference). A sample size of 52 is required to detect an effect size of 0.40 at 0.80% of power, in a paired-sample test with a normal distribution. We planned an increase in sample size of 6 participants, because the expected drop-out rate is 10% due to possible acute clinical conditions interfering with the participation in the study, or death.

For the present observational feasibility study, 58 older adults (65-85 years), randomly extracted among 93 eligible participants, will be recruited among donors of the Brain Bank who previously have expressed the willingness to adhere to the study. Participants will undergo both face-to-face and remote testing sessions in a counterbalanced cross-over design. Each individual will undergo a comprehensive neuropsychological assessment consisting of a set of cognitive tests (memory, attention, etc) administered remotely via telephone calls or videoconferencing and face-to-face. Participants will be randomly allocated to one of the two conditions (remote first or face-to-face first). Each participant will take part to the second evaluation (remote or face-to-face) 8 weeks later. To reduce learning effect bias and intra-rate variability, this procedure will be counterbalanced so that half of the participants first experience the face-to-face interaction and the other half will initially receive the videoconference administration.